The answers are B C and D because there many different ways.
Their mission was to explore the unknown territory, establish trade with the Natives and affirm the sovereignty of the United States in the region.
A vast desert, in which nothing can live.
Only Native Americans can live in this area.
In late 1800's to early 1900's massive farming took over.
Called bonanza farms. Over farming led to destruction of the top soil.
This led to the dust bowl.
Domesticating plants marked a major turning point for humans: the beginning of an agricultural way of life and more permanent civilizations. Humans no longer had to wander to hunt animals and gather plants for their food supplies. Agriculture—the cultivating of domestic plants—allowed fewer people to provide more food.
It would be "Planes" that is a <span>mode of transportation that was not included in the transportation revolution of the 19th century, since planes in terms of commercial and person travel did not come into being until much later. </span>
